[Merge] ~ubuntu-server-dev/ubuntu/+source/percona-xtradb-cluster-5.7:jp-review-fixes into ~ubuntu-server-dev/ubuntu/+source/percona-xtradb-cluster-5.7:master

[James Page]

1) sure - I thought I had the boost one covered but maybe not

2) No - infact this prevents PXC 5.7 from starting (hence why I dropped it)

3 & 4

Bah - I thought I had those covered but apparently not...

-- 
https://code.launchpad.net/~ubuntu-server-dev/ubuntu/+source/percona-xtradb-cluster-5.7/+git/percona-xtradb-cluster-5.7/+merge/337000
Your team Ubuntu Server Developers is subscribed to branch ~ubuntu-server-dev/ubuntu/+source/percona-xtradb-cluster-5.7:master.